The extension cannot start

[duy-nguyen-devops]

The error log is here

ip-172-20-1-213==> [Agent-Monitor-Scheduler-2] 01 Jun 2022 11:43:29,617 ERROR PeriodicTaskRunner - Error creating environment task
java.lang.ClassCastException: class java.lang.String cannot be cast to class java.util.Map (java.lang.String and java.util.Map are in module java.base of loader 'bootstrap')
	at com.appdynamics.extensions.network.NetworkMonitor.getServers(NetworkMonitor.java:54) ~[?:?]
	at com.appdynamics.extensions.AMonitorJob.run(AMonitorJob.java:47) ~[?:?]
	at com.appdynamics.extensions.ABaseMonitor.executeMonitor(ABaseMonitor.java:199) ~[?:?]
	at com.appdynamics.extensions.ABaseMonitor.execute(ABaseMonitor.java:187) ~[?:?]
	at com.singularity.ee.agent.systemagent.components.monitormanager.managed.MonitorTaskRunner.runTask(MonitorTaskRunner.java:149) ~[machineagent.jar:Machine Agent v22.4.0-3344 GA compatible with 4.4.1.0 Build Date 2022-04-26 16:17:31]
	at com.singularity.ee.agent.systemagent.components.monitormanager.managed.PeriodicTaskRunner.runTask(PeriodicTaskRunner.java:86) ~[machineagent.jar:Machine Agent v22.4.0-3344 GA compatible with 4.4.1.0 Build Date 2022-04-26 16:17:31]
	at com.singularity.ee.agent.systemagent.components.monitormanager.managed.PeriodicTaskRunner.run(PeriodicTaskRunner.java:47) [machineagent.jar:Machine Agent v22.4.0-3344 GA compatible with 4.4.1.0 Build Date 2022-04-26 16:17:31]
	at com.singularity.ee.util.javaspecific.scheduler.AgentScheduledExecutorServiceImpl$SafeRunnable.run(AgentScheduledExecutorServiceImpl.java:122) [agent-22.5.0-415.jar:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) [?:?]
	at com.singularity.ee.util.javaspecific.scheduler.ADFutureTask$Sync.innerRunAndReset(ADFutureTask.java:335) [agent-22.5.0-415.jar:?]
	at com.singularity.ee.util.javaspecific.scheduler.ADFutureTask.runAndReset(ADFutureTask.java:152) [agent-22.5.0-415.jar:?]
	at com.singularity.ee.util.javaspecific.scheduler.ADScheduledThreadPoolExecutor$ADScheduledFutureTask.access$101(ADScheduledThreadPoolExecutor.java:119) [agent-22.5.0-415.jar:?]
	at com.singularity.ee.util.javaspecific.scheduler.ADScheduledThreadPoolExecutor$ADScheduledFutureTask.runPeriodic(ADScheduledThreadPoolExecutor.java:206) [agent-22.5.0-415.jar:?]
	at com.singularity.ee.util.javaspecific.scheduler.ADScheduledThreadPoolExecutor$ADScheduledFutureTask.run(ADScheduledThreadPoolExecutor.java:236) [agent-22.5.0-415.jar:?]
	at com.singularity.ee.util.javaspecific.scheduler.ADThreadPoolExecutor$Worker.runTask(ADThreadPoolExecutor.java:694) [agent-22.5.0-415.jar:?]
	at com.singularity.ee.util.javaspecific.scheduler.ADThreadPoolExecutor$Worker.run(ADThreadPoolExecutor.java:726) [agent-22.5.0-415.jar:?]
	at java.lang.Thread.run(Thread.java:829) [?:?]

My config.yml

# Use the following metricPrefix if SIM is enabled.
# metricPrefix: "Server|Component:<COMPONENT_ID>|Custom Metrics|Network|"
# Use the following metricPrefix if SIM is not enabled.
metricPrefix: "Custom Metrics|Network|"

# In case of linux, networkInterface names are of the form eth*
# In Windows, please use the network full name from Device Manager
networkInterfaces: [ "eth0" ]

overrideMetricsUsingScriptFile: false

scriptTimeoutInSec: 60

scriptFiles:
  - osType: windows
    filePath: monitors/NetworkMonitor/scripts/windows-metrics.bat
  - osType: unixBase
    filePath: monitors/NetworkMonitor/scripts/unix-base-metrics.sh

numberOfThreads: 2

# Default information needs to be updated
controllerInfo:
  controllerHost: "controller"
  controllerPort: 8080
  account: "customer1"
  username: "user1"
  password: "welcome"
  encryptedPassword: ""
  controllerSslEnabled: false
  enableOrchestration: false
  uniqueHostId: ""
  accountAccessKey: ""
  machinePath: ""
  simEnabled: true
  applicationName: ""
  tierName: ""
  nodeName: ""

encryptionKey: ""

I found that in code error with this line at https://github.com/Appdynamics/network-monitoring-extension/blob/master/src/main/java/com/appdynamics/extensions/network/NetworkMonitor.java

50	@Override
51	protected List<Map<String, ?>> getServers() {
52		List<Map<String, ?>> networkInterfaces = (List<Map<String, ?>>) getContextConfiguration().getConfigYml().get("networkInterfaces");
53		List<Map<String, ?>> anInterface = new ArrayList<>();
54		anInterface.add(networkInterfaces.get(0)); # <-- ERROR THIS LINE
55		AssertUtils.assertNotNull(anInterface, "The 'networkInterfaces' section in config.yml is not configured");
56		return anInterface;
57	}